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Plane Problem

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Pycckuu

FNG / Fresh Meat
Nov 21, 2005
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It will fly, the plane pushes off of the air, not the ground. It won't matter if its velocity relative to the ground is zero: as soon as it generates enough lift, its outta there. Tis a classic physics problem.
 

Crusher

FNG / Fresh Meat
Nov 22, 2005
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it won't, the plane stays at one spot, it doesn't make any sense if it would take off, the only thing that's diffrent when a plane is standing still on the ground are the wheels that are running
 

Murphy

FNG / Fresh Meat
Nov 22, 2005
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It will fly, the plane pushes off of the air, not the ground. It won't matter if its velocity relative to the ground is zero: as soon as it generates enough lift, its outta there. Tis a classic physics problem.
How can it generate life if its standing still? It generates life by passing through the air, at first it does so on the ground until it takes off and then it does it in the air. It its standing still it can
 

Lizardhands

FNG / Fresh Meat
Nov 24, 2005
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Of course it won't fly.

The plane needs to be moving forward to push air downwards with its wings, or it won't take off. Simple.
 

-=KnIfE=-

FNG / Fresh Meat
Nov 21, 2005
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errrr, yes it will fly.

It wont stay still.....

Just the wheels will spin faster than if it was on motionless ground. But it will still move forwards.

someone gave a good example. Put a treadmill up against a wall, and attach rope to the wall next to the treadmill. Put some roller skates on, then stand on the treadmill. Hold the rope so you arent moving then turn the treadmill on. Then try and pull yourself forwards. You will be able to, just like the engines of a plane would be able to move the plane, because all the treadmill will do is turn the wheels, not move the plane.
 

User Name

FNG / Fresh Meat
Jan 12, 2006
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It will fly. The wheels aren't moving the plane forward. The engines are. They are not affected by the treadmill. The wheels would just spin faster.
 

Lizardhands

FNG / Fresh Meat
Nov 24, 2005
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No. A plane has to get to a certain ground speed before it has enough lift to start ascending. Engines only push the plane forward, and the problem clearly states that the treadmill is exactly opposite to the plane's forward movement. There is no resultant force and therefore no acceleration, and therefore NO LIFT. It is the simplest of physics.
 

Deeival

FNG / Fresh Meat
Sep 4, 2006
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Notice how it says "Airflow"? There will be none if the plane is stationary!






Everyone in favour of lift-off: Back to school!
 

Bauer

FNG / Fresh Meat
Dec 24, 2005
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Canada
It will fly, the plane pushes off of the air, not the ground. It won't matter if its velocity relative to the ground is zero: as soon as it generates enough lift, its outta there. Tis a classic physics problem.
But it matters if the velocity relative to the air is also zero. And since given the current conditions air velocity approximates ground velocity... that plane will not fly. Wind speed is definitely not enough to generate lift for that kind of plane.
 

Pycckuu

FNG / Fresh Meat
Nov 21, 2005
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Except, it won't be stationary because the wheels just spin faster. The plane takes off... you can google it up if you want, this isn't exactly a new problem.
 

Pycckuu

FNG / Fresh Meat
Nov 21, 2005
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What? The problem says it will be stationary... You cant just change the question!
It doesn't, it says
The treadmill has a clever design and always matches the speed of the plane
There is a difference between how cars and how planes move, which is the center piece of this problem.
 
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